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    <title>Document</title>
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<body>
    <script>
       
        while(true){
          
        let uname = prompt('请输入您的用户名')
        let password = prompt('请输入您的密码')

        if(uname === 'admin' && password === '123456'){
            alert('登录成功！')
            break
        }
       
        }
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